Ace_OS 命名空間記錄

原創

2020-02-22 17:07

This namespace defines an OS independent programming API that shields developers from nonportable aspects of writing efficient system programs on Win32, POSIX and other versions of UNIX, and various real-time operating systems.

This class is a wrapper for the XTI/TLI operations.

This namespace encapsulates the differences between various OS platforms. When porting ACE to a new platform, this class is the place to focus on. Once this file is ported to a new platform, pretty much everything else comes for "free." See <www.cs.wustl.edu/~schmidt/ACE_wrappers/etc/ACE-porting.html> for instructions on porting ACE. Please see the README file in this directory for complete information on the meaning of the various macros.
說得很厲害一樣，就是實現了跨平臺功能，才用ACE_OS 這個命名空間來封裝。

頭文件 "ace/OS_NS_fcntl.h" 下的函數：
    1 ACE_HANDLE open (const char *filename,
                   int mode,
                   mode_t perms = ACE_DEFAULT_OPEN_PERMS,
                   LPSECURITY_ATTRIBUTES sa = 0);//打開一個文件;
    2    int fcntl (ACE_HANDLE handle,
             int cmd,
             long arg = 0);
頭文件 "ace/OS_NS_stdio.h"下的函數：
   1 int sprintf (char *buf, const char *format, ...);
   2 int vasprintf (char **bufp, const char *format, va_list argptr);

頭文件 “ace/OS_NS_stdlib.h” 下的函數：//相當於c 語言中的 stdlib.h,包括內存的申請和釋放
   1 int atoi (const char *s);
   2 long atol (const char *s);
   3 void free (void *);
   4 int setenv(const char *envname, const char *envval, int overwrite); 等函數。

頭文件 “ace/OS_NS_pwd.h” 下的函數：
   1 struct passwd *getpwnam (const char *user);

頭文件 “ace/OS_NS_unistd.h” 下的函數：
   1 int access (const char *path, int amode);
   2 int argv_to_string (ACE_TCHAR **argv,
                      ACE_TCHAR *&buf,
                      bool substitute_env_args = true,
                      bool quote_args = false);
   3 int rmdir (const char *path);
   4 pid_t fork (void); 等函數
   5 int sleep (u_int seconds);

頭文件 "ace/OS_NS_string.h"下的函數：//字符串操作
   1 char *strcpy (char *s, const char *t);
   2 int strcmp (const ACE_WCHAR_T *s, const ACE_WCHAR_T *t);
   3 void *memset (void *s, int c, size_t len);

頭文件 "ace/os_include/os_netdb.h" 包含 MAXHOSTNAMELEN 的定義。